1,2

These usually appear as beds with white backgrounds with green doubles beds.

Cf. A003833, A008575, A104158, A104159.

Sequence in context: A141667 A048753 A055719 this_sequence A106387 A034771 A034764

Adjacent sequences: A117880 A117881 A117882 this_sequence A117884 A117885 A117886

nonn

Danny Williamson (daniel.williamson(AT)durham.ac.uk), May 02 2006